.rule{
    width: 100%;
    height: 100%;
    background-color: #ffffff;
}
.nav{
    width: 100%;
    line-height: 60px;
    display: flex;
    position: fixed;
    /* top:10px; */
    background-color: #fff;
}
.span{
    font-size: 22px;
    margin-left:10px;
}
.img{
   
    width: 100%;
    height: 92%;
    display: flex;
    padding: 0 10px;
    align-items: center;
    text-align: center;
}
.img img{
    margin-top: -70px;
    width: 360px;
   
}